Water Tec Int’l. Inc. Version 02A
TROUBLE SHOOTING GUIDE
SYMPTOM POSSIBLE CAUSE SOLUTION
RO unit will not start No electrical power to control circuit Check power supply
On/Off Switch Check power / replace
Time delay not operating Check power / replace
Fuse Check / replace
Coil in magnetic motor starter burned out
Check / replace motor or coil
Liquid Level Control Relay Check for power
Pump motor Check / replace
Low Pressure
Low feed pressure Incoming feed water supply may be off Check
Incoming feed water supply line may be Check / replace line if kinked
Restricted / under sized
Upstream pretreatment Check all pretreatment
Pre-Filter may be clogged / dirty Check / replace
Low Pressure Switch Check for power / replace
No high pressure Reject valve open too far Check / adjust
Reject bypass may be open Check / adjust
High pressure gauge may be broken Check / replace
Restriction in tubing to gauge Check / replace / replace if kinked
Pump impellers may be worn Check / replace impellers or pump
Low water volume to pump Check
No waste water Waste Valve may be closed Check / open / adjust
Clogged drain line Check / replace / replace if kinked
No product water or low Pump pressure may be too low Check / adjust
Product water Waste valve open too far Check / adjust
Membranes may be fouled / dirty Check / clean / replace
Water temperature may be low Check
High TDS in permeate water TDS monitor or probe Check / adjust / replace
Low pump pressure Check / adjust
Membranes may be clogged / dirty Check / clean / replace
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